Portion of a shoe



FIG. 1 is a front view of a portion of a shoe showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a right side view thereof; and,

FIG. 4 is a left side view thereof.

The shade lines in the Figures show contour and not surface ornamentation.

The broken lines in the Figures show portions of the shoe which form no part of the claimed design. 

CLAIM The ornamental design for a portion of a shoe, as shown and described. 